Goldfish Encyclopedia — 77 Species Directory
Encyclopedia of popular goldfish varieties with care guides, traits, and show standards.
Showing 7 of 77 species
Black Ranchu
Carassius auratus var.
A ranchu that shines jet black all over. The combination of a solid black chic body color and typical ranchu body shape has unique appeal. Color can change, so environmental management to maintain black coloration is important.
Brown Ranchu
Carassius auratus var.
A ranchu with calm brown body coloration. Brown goldfish are rare and appreciated by enthusiasts for their unique beauty. Can be maintained using the same methods as regular ranchu.
Calico Ranchu
Carassius auratus var.
Ranchu with red, white, and black calico pattern. Some have transparent scales revealing internal red. Unique beauty. Shows evaluate pattern balance.
Edonishiki Ranchu
One of finest ranchu. Treasure of Japanese goldfish with improvement history from Edo period.
Osaka Ranchu
Carassius auratus var.
A classical ranchu strain developed in Osaka during the Edo period. Has distinct body characteristics from Tokyo ranchu strains, once called a phantom breed. A rare variety preserved and passed down by enthusiasts.
Red-white Ranchu
Carassius auratus var. ranchu
A ranchu with vivid red patterns on a white base. The red-white color scheme is striking when viewed from above, making it popular in shows. Combines ranchu body beauty with red-white coloration.
Sakura Ranchu
Carassius auratus var.
Ranchu with transparent scales. Internal red shows through as pale pink, resembling cherry blossoms — hence the name. Delicate beauty popular with female enthusiasts.
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Goldfish FAQ
- How much do goldfish cost?
- Common varieties like wakin and ryukin cost 300-2,000 yen, ranchu 3,000-30,000 yen, and show-quality specimens can reach tens of thousands to hundreds of thousands of yen.
- Can beginners keep goldfish?
- Hardy varieties like wakin, ryukin, and telescope goldfish are recommended for beginners. A tank and filter are all you need, and no heater is required.
- How long do goldfish live?
- With proper care, goldfish live 10-15 years, and some individuals can live 20+ years. Water quality management and proper feeding are key to longevity.
- What should I check when buying goldfish?
- Look for symmetrical body shape, stable swimming, well-formed fins, and no injuries or white spots. Breed-specific aesthetic standards are also helpful references.
- What should I be careful about when keeping goldfish?
- Overfeeding causing poor water quality is the most common issue. Feed 1-2 times daily in amounts eaten within 2 minutes, and never skip weekly water changes.